Make sure to read the contents of every Datapad, and work out how to access any ‘Security locked’ data (especially in the Archives room).
Do I need to have all the datapads with me when i confront Gail?
Nope, you just need to have read them. You can check to see which ones you’ve read (along with locations visited, schematics added and security-locked data accessed) by clicking on ‘settings’ then ‘completion’.